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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>不常用的标签用法</title>
</head>
<body>
    2<sub>2</sub>
    4<sup>2</sup>
    <small>小号字</small>
    <del>删除线</del>
    <em>强调</em>



    <table border="1" cellpadding="20" cellspacing="10">
        <caption>table标题</caption>
        <thead>
            <tr>
                <th>sdfasdf</th>
                <th>sdfasdf</th>
                <th>sdfasdf</th>
                <th>sdfasdf</th>
                <th>sdfasdf</th>
            </tr>
        </thead>
        <tbody>
            <tr>
                <td>这是内容1</td>
                <td>这是内容2</td>
                <td>这是内容3</td>
                <td>这是内容4</td>
                <td>这是内容5</td>
            </tr>
            <tr>
                <td>这是内容1</td>
                <td>这是内容2</td>
                <td>这是内容3</td>
                <td>这是内容4</td>
                <td>这是内容5</td>
            </tr>
            <tr>
                <td>这是内容1</td>
                <td>这是内容2</td>
                <td>这是内容3</td>
                <td>这是内容4</td>
                <td>这是内容5</td>
            </tr>
            <tr>
                <td>这是内容1</td>
                <td>这是内容2</td>
                <td>这是内容3</td>
                <td>这是内容4</td>
                <td>这是内容5</td>
            </tr>
            <tr>
                <td>这是内容1</td>
                <td>这是内容2</td>
                <td>这是内容3</td>
                <td>这是内容4</td>
                <td>这是内容5</td>
            </tr>
        </tbody>
    </table>
</body>
</html>